Not everything that you have to do to reach your goal is pleasant. Occasionally, you will encounter tasks that you dislike. People will let you down ........ things won't always go according to plan ........ you will become irritated, frustrated and may even feel like quitting.
Realise that you are not alone and that all these feelings have been experienced by everyone who has pursued a worthy goal. They are what make it all worthwhile in the end.
It is overcoming your natural desire to give up and go after something easier that results in your personal growth.
Remember that winners never quit and quitters never win. Long-term goals keep you from becoming frustrated by short-term failures and setbacks.